I suspect that a lot of carbs are needlessly rebuilt. I rebuilt a carb and as I was looking at it, I thought that it seemed pretty clean. Turned out that the carb was not the issue.
OTOH, I had a Q-jrt that needed rebuilding every couple of tears. This was a daily driver. I wouldn't idle properly and the turning mixture needles in and out had no effect. Finally got tired of it and got an AFB and had no trouble after that.
